Draws a page of a document to a graphic file (thumbnail). This is a parameter of the VAPIM_DRAW message.
#include <kvvapi.h> SendMessage(hWndVAPI,VAPIM_DRAW, VAPIMWP_DRAW_DRAWTOFILE, (LPARAM) (TPVAPIDrawFileInfo*) pDrawInfo );
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The handle of the VAPI window. |
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A pointer to a TPVAPIDrawFileInfo structure that contains information used for drawing a page to a file. To draw pages in any order, set the |
SendMessage() returns:
VAPI_RETURN_SUCCESS if the call succeeds.
VAPI_RETURN_NOT_INITIALIZED if the drawing routines have not been initialized.
VAPI_RETURN_NO_PAGE if the requested page does not exist, or is being displayed before all previous pages have been displayed.
VAPI_RETURN_NOT_AVAILABLE if the document does not support this feature (for example, ZIP files, video, audio).
VAPI_RETURN_ERROR if an error has occurred.
Page numbers start at 0. For example, set uPageNumbers to 0 to draw page 1, and to 1 to draw page 2. For word processing documents, pages must be drawn sequentially. For example, to draw page 3, you must first draw pages 0 and 1.
To draw pages in any order, set the bWait parameter in the TPVAPIOpenDocumentInfo structure to FALSE.
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